Catch missed content edits from tree restructure

The fe39fcb commit captured the file moves (git mv stages those automatically)
but didn't catch the content edits I made afterward — npm package rename
(@mizan/runtime → @mizan/base), path updates in Makefile/Dockerfile/examples,
and doc updates were all left unstaged at commit time.

This commit lands those:
- npm rename: 3 frontend package.jsons (base/vue/svelte) + mizan-base/src/index.ts + 4 codegen templates
- path updates: Makefile, Dockerfile.test, two Gitea workflows, four example/harness configs
- doc updates: CLAUDE.md, ROADMAP.md, ISSUES.md, docs/AFI_ARCHITECTURE.md

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.gitea/workflows/publish-django.yaml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     defaults:
       run:
-        working-directory: django
+        working-directory: backends/mizan-django
     steps:
       - uses: actions/checkout@v4
 

.gitea/workflows/publish-react.yaml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     defaults:
       run:
-        working-directory: react
+        working-directory: frontends/mizan-react
     steps:
       - uses: actions/checkout@v4